/Engine/Source/Runtime/CoreUObject/Public/UObject/SparseDelegate.h
Directly sets the Multicast Delegate for this object/delegatename pair. If the delegate is unbound it will be assigned/inserted anyways.
static void SetMulticastDelegate ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * DelegateOwner, const [FName](API\Runtime\Core\UObject\FName) DelegateName, FMulticastScriptDelegate Delegate )